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TI-80
TI-80 is a graphing calculator made by Texas Instruments. It was originally designed in 1995 to be used at a middle school level (grades 6-8).
The TI-80 featured the smallest screen and slowest processor (980 kHz proprietary) of any TI graphing calculator. Additionally, the TI-80 had the processor on board a Toshiba T6M53A ASIC, unlike later calculators like the TI-83, TI-83 Plus, and TI-84 Plus which had separate ASIC and processor chips in certain models. In comparison, the TI-81, released in 1990, featured a 2 MHz Zilog Z80 processor. However, the TI-80 did feature 7 KB of RAM (compared with the TI-81's 2.4 KB). The TI-80 also had more built-in functions than the TI-81 (such as list and table functions, as well as fraction and decimal conversions). Like the TI-81, the TI-80 did not feature a link port. The TI-80 was also the only graphing calculator to use 2 CR2032 lithium batteries (instead of the standard 4 AAA batteries with a lithium backup battery).
Since its release, it has been superseded by the superior TI-73 and TI-73 Explorer. The TI-80 has been discontinued.
==See also==
* Comparison of Texas Instruments graphing calculators
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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